SKU: SS21328 Mat Size: Long Mat Type: Airbeds Sleeping Season Rating: Winter R-Value: 6.2 Weighs: 956g UOG TOP PICK - Ether Light XT Extreme Sleeping Mat Builds on the success of the original Ether Light XT comes this Extreme version. With double the amount of insulation and an R-Value almost twice as high this mat will c… Ether Light XT Extreme Sleeping Mat - Large